P1652 & truck will not run
 

It started with all my gauges going dead intermittently. Not all gauges would always go dead together either, also the brake, abs, CEL, and air bag light would come on and go off. Now occasioanlly the truck will not keep running. It will start and then after a few seconds stall, this is accompanied by the little red light coming on beside the temp gauge. Last night I could not keep the truck running unless I rapidly cycled the key once it started. I let it sit overnight and tried it this morning, it started and kept running, but now the brake and abs lights are on. I can't drive the truck like this because I don't know when it's going to not start. Currently the fan clutch is unplugged as I was told this might have been the problem, but it's not. Also, when it acts up like this my code reader will not communicate with the truck. I need help urgently and don't know where to go from here. Should I replace the gauge cluster ($600), or rip apart all the wiring? Does anyone have a wiring diagram for the J1850 communication bus? I know code P1652 means it's shorting out somewhere.

this may sound weird but my truck did the same thing and it was the alternator. 2004 dodge. it was charging sometimes and sometimes not. it started with my gauges not working and then after a few weeks of driving it it would just die after a few seconds of running. I would try the alternator. fixed all my problems

Clean all your grounds real good! do the wiggle test on that harness! While running grab the harness and wiggle it! If it dies in the area your holding your close! Short to ground is hard to find!